Panic exit-lock.



A. M. KELLEY.

PANIC EXIT LOCK.

APPLICATION FILED JAN. 30, 1914.

llblk WM 9 1 1 m Patented Apr. 20, 1915,

' INVENTOR.

tpeoittcatton of Letter-a Patent.

Patented ihplr. 2W, TWTH.

application tiled January 30, 1914. Serial No. area.

To all whom it may concern:

Be it known that T, ARTHUR M. LLEY, a citizen of the United States, and a resident of Toledo, in the count of Lucas'and State of Ohio, have invente a certain new and useful Panic Exit-Lock; and T do hereby declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to panic locks having a means inclosed within aglass panel or cover which may be operated to unlock the lock.

'two ear brackets 12 and a pivot pin.

The invention may be contalned in many constructions, all of which come within the urview of my claims hereinafter appended.

0 show the practicabilit of constructions embodying my invention have selected one of such constructions as an example and shall describe it hereinafter. The construction selected is illustrated in the accompanying drawings.

Figure 1 of the drawings illustrates a side sectional view of a panic lock containing my invention. Fig. 2' is a front view partly in section of the lock shown in Fig. 1. Fig. 3 illustrates a perspective view of a pin tumbler cylinder used in connection with my invention. Fig. 4 illustrates a detail.

1, Fig. 1, is a part of a door on which the device embodying my invention is mounted.

2 is a lock of a well-known construction, which is provided with a latch lever shoe 3, which will operate the anti-friction latch bolt 4 of well known construction. The lock may also be provided with the pin tumbler cylinder 5 which operates the bolt 9. The

shoe 3 operates upon the latch lever 6 for pulling the bolt 4 back into its socket to unlock the door. A bell crank lever 10 is fulcrumed in a casing or container 11 on the upper end wall of the casing by mean?) of ne arm 13 of the bell crank lever extends into an opening 15 formed in the door 1 and beneath the latch lever shoe 3 so that when the arm 14 is pressed inward the latch lever shoe 3 will be pressed against one arm of the latch lever 6, one end of which slides transversely on the shoe 3 and at the same time moves the other arm of the latch lever 6 so as to draw the bolt 4 from the jamb or door casmg 23 and unlock the door. The casing or container 11 is covered preferably with a glass plate 16 which prevents any one from operating thearm 14 of the bell crank lever 10 except 1n times of danger when the glass 16' may be broken and then the bell crank lever 10 may be 0 erated.

The bell crank ever 10 may also be operated by means of the pin tumbler c linder 17, which is provided with a pin 18 ocated at one side of the end of. the arm 14 of the bell crank lever 10. The pin tumbler cylinder may be operated by the same key thatis used to operate the pin tumbler cylinder 5. When the arm 14 has been pushed inwardly by the rotation of the cylinder the end of the arm engages with a latch 19, which may be spring pressed or may be held in normal position by means of the weight of the head 20. The latch 19 operates to hold the arm 14 against or near the door and against the operation of the spring 21,

which tends to return the arm 14 to its normal posltlon. The end 22 of the arm 14 is made spatulate in order that it may extend across the diameter of the pin tumbler cylinder and also to a point such that it will be engaged by the latch 19.

When the end of the bell crank lever 14 is held against or near the door by the latch 19 the arm 13 holds the latch member shoe up and holds the bolt 4 back in its socket. By this means the door is unlocked and may be opened and closed as may be desired by the use of the usual knob having the usual engaging and disengaging bolt. The door may then be used for the purposes of 'exit and entrance, as may be desired. When it is desired to return the lock to such a condition that it may be used as a panic lock and also to prevent the door from being used promiscuously for exit and entrance, the head 20 of the latch 19 may be pushed up which will draw the latch 19 down and permit the lever arm 14'to swing forward by the operation of the spring 21, pushing at the same time the pin 18 to its outermost position. When the lock is in this condition, in case of panic or when conditions arise which cause great danger the glass 16 may be broken by the use of any instrument or by the hand, whereupon the lever 14 may be pressed inward and the door unlocked. If, however, any one has used the 'a v. 86. v

panic lock without the use of a key the fact that the glass is broken will immediatelyindicate that it has been so used.

The construction selected and described ma be greatly varied in the arrangement an connections of its parts and in the substitution of elements having equivalent functions, and such modifications may still contain the invention which is described .in the claims in the language of the elements shown. 7

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,

1. The combination of a lock having a latch shoe, a lever for operating the latch shoe, and a casinghaving a glass wall for inclosing the said lever and a lock cylinder extending through the said casing for operating the said lever. 7

- atlng the 2. The combination of clock having' a latch shoe a spring pressed lever for operiatch shoe, and a casin having a glass 'wall for inclosing the said lever and a lock cylinder extending through the said casing for operating the said lever.

3. he combination of a lock having a bolt, a lever for operatin the said bolt, a casing having a lass wal for inclosing the said ever, a loc cylinder located in one wall of the casing for operating the said lever and a latch for engaging the said lever to hold the bolt in unlocked osition.

In testimony whereof, I ave hereunto signed my name to this specification in the presence of two subscribin witnesses.

ARTHUR KELLEY. Witnesses:

F. E. Ann,

R. G. ALLEN. 

